#include<stdio.h>
void  main()
{
    int years;
    scanf("%d",&years);
    if (years<=1))
    {
        printf("Invalid Input");
    }
    else if(1>=years && years<=5)
    {
        printf("5%%");
    }
    else if(6<=years && years<=10)
    {
        printf("10%%");
    }
    else if (a>=10)
    {
        printf("15%%");
    }
    
}